feat: Implement basic general folder support (#2051)

- Related: #1748

tests/components-lib/media-grid-controller.test.ts

@@ -15,8 +15,9 @@ import {
   createSlotHost,
 } from '../test-utils';
 
-vi.mock('lodash-es/throttle', () => ({
-  default: vi.fn((fn) => fn),
+vi.mock('lodash-es', async () => ({
+  ...(await vi.importActual('lodash-es')),
+  throttle: vi.fn((fn) => fn),
 }));
 
 const masonry = mock<ExtendedMasonry>();